P054C

Cold Start B Camshaft Position Timing Over-Advanced Bank 2

Camshaft timing (VVT) Generic OBD-II High

What it means

P054C sets when the exhaust (B) camshaft on bank 2 is timed too far advanced during a cold start, so the variable valve timing isn't where the ECM commanded. It usually stems from oil condition or a sticking cam actuator, and typically shows up as rough cold running rather than a breakdown.

High

Can I keep driving? Usually drivable — the engine typically runs rough when cold and smooths out warm, but ongoing cam-timing errors can hurt performance and emissions, so fix it soon.

Common symptoms

What you'll notice

Check-engine light on
Rough or unstable idle, especially right after a cold start
Poor acceleration or reduced engine performance
Occasional excessive exhaust smoke

Common causes

Most likely first

Dirty or degraded engine oil restricting the cam actuatorLikely
Low engine oil level (VVT relies on oil pressure)Common
Faulty exhaust camshaft actuator / oil control valve (OCV) on bank 2Common
Open, shorted, or poorly connected actuator solenoid wiringLess often
Faulty engine control module (ECM)Less often

How to diagnose & fix

Work through it in order

Check engine oil level and condition first; top up or change dirty oil, which commonly cures VVT timing codes.
Read freeze-frame data to confirm the fault occurred during a cold start.
Test the oil control valve / cam actuator solenoid resistance (roughly 6.9-7.9 ohms) and check it moves freely.
Inspect the solenoid connector and wiring for opens, shorts, or corrosion; repair as needed.
If the actuator and wiring check out, suspect the ECM. Clear and re-test after each step.

FAQ

Quick answers

Is it safe to drive with P054C?+

Short term, usually yes — it typically shows as rough cold running. But cam-timing faults affect performance and emissions, so don't ignore it, and check your oil right away.

Can I just clear P054C?+

You can, but it returns after the next cold start unless the underlying cause — often old oil or a sticking cam actuator — is fixed.

Related codes

Often seen with P054C

P0011A Camshaft Position - Timing Over-Advanced P0014B Camshaft Position - Timing Over-Advanced P0021A Camshaft Position - Timing Over-Advanced P0024B Camshaft Position - Timing Over-Advanced

Read & clear P054C yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

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✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX